chore: remove g3-console crate entirely

The g3-console crate was not referenced by any other crate in the
workspace and appears to be an abandoned web console implementation.

Removed:
- crates/g3-console/ (entire directory)
- Workspace member entry in Cargo.toml

Agent: fowler

Cargo.toml

@@ -7,7 +7,6 @@ members = [
     "crates/g3-config",
     "crates/g3-execution",
     "crates/g3-computer-control",
-    "crates/g3-console",
     "crates/g3-ensembles"
 ]
 resolver = "2"